Node.js · Theory

console.dir() Method

Theory

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console.dir() Method

console.dir() Method is a Node.js idea you prove with console.dir Method on Arun's board, not with a slogan.

Do console.dir() Method once by hand. one console.dir Method step Arun can write from memory. Change one input. Say the new result out loud.

Without console.dir() Method, lab hour gets messy and console.dir Method on Arun's board is hard to trust.

Use console.dir() Method when console.dir Method on Arun's board must stay clear. If a simpler Node.js step works, use that instead.

Don’t do this with console.dir() Method: copy-pasting console.dir Method without a dry-run. Interviewers spot it in ten seconds.

Place console.dir() Method next to nearby Node.js work — one console.dir Method step Arun can write from memory is the link.

Viva for console.dir() Method: what it is → one console.dir Method step Arun can write from memory → the mistake (copy-pasting console.dir Method without a dry-run).

Exam tip

Board: console.dir Method on Arun's board. Dry-run console.dir() Method. Name the trap: copy-pasting console.dir Method without a dry-run.

Example

// console.dir() Method
const users = [
  { id: 1, name: "Asha" },
  { id: 2, name: "Ravi" },
];

function findUser(id) {
  return users.find((u) => u.id === id) ?? null;
}

console.log(findUser(2));
console.log(users.map((u) => u.name));

console.dir() Method: find user 2, then list names. Say both prints.

Short notes

Defconsole.dir() Method — Arun uses it for console.dir Method on Arun's board in lab hour.
Ruleconsole.dir() Method → one console.dir Method step Arun can write from memory.
Rememberconsole.dir() Method + the event loop (lab hour).
Useconsole.dir() Method in lab hour (console.dir Method on Arun's board).
Trapconsole.dir() Method — copy-pasting console.dir Method without a dry-run.
Exconsole.dir() Method → console.dir Method on Arun's board.

// console.dir() Method const users = [ { id: 1, name: "Asha" }, { id: 2, name: "Ravi" }, ]; function findUser(id) { return users.find((u) => u.id === id) ?? null; } console.log(findUser(2)); console.log(users.map((u) => u.name));

console.dir() Method

Example

Short notes

Questions

console.dir() Method

Example

Short notes

Questions